Overview
SIST EN 301 921 V1.1.1:2005 specifies the inter-exchange signalling protocol for the Simple Dialog supplementary service within Private Integrated Services Networks (PISN). Based on ISO/IEC 21408 (2003) with modifications, this standard supports transparent exchange of keypad and display information between users or applications across network exchanges. By facilitating seamless communication through QSIG (PSS1 protocol), it plays a crucial role in enabling interactive services and enhanced user experiences in telecommunication infrastructures.
This standard was developed by the Slovenski inštitut za standardizacijo (SIST) and endorsed by the European Telecommunications Standards Institute (ETSI), ensuring compatibility and interoperability across European and international networks.
Key Topics
- Simple Dialog Supplementary Service: Enables a user or application to exchange keypad input and display output with another user or application over PISN, ensuring interactive capabilities.
- Inter-exchange Signalling Protocol: Details the mechanisms for exchanging service-related signalling messages at the Q reference point between PISN exchanges.
- QSIG Protocol (PSS1): Utilizes the widely-adopted QSIG protocol for standardized network communication, contributing to consistency in interworking between different vendors’ equipment.
- Reference to International Standards: Directly aligns with ISO/IEC 21408 (2003), with additional modifications to suit European network environments.
- Normative References: Specifies related protocols needed for full implementation, such as circuit-mode basic services and generic functional protocols for supplementary services.
Applications
The practical applications of SIST EN 301 921 V1.1.1:2005 are found in business and organizational telecommunication networks that require:
- Interactive Automated Services: Supports services like voicemail systems, call center IVRs (Interactive Voice Response), or automated attendants where keypad and display interaction is essential.
- Enterprise Communication: Enables a range of supplementary services in large organizations with their own PISNs, facilitating enhanced productivity and streamlined user experiences.
- Enhanced User Interaction: Supports scenarios where bidirectional communication of keypresses and on-screen prompts is required, such as remote login procedures, authentication services, and application-driven processes.
- Vendor Interoperability: Guarantees that different PISN systems from various manufacturers can communicate effectively, reducing integration challenges in multi-vendor environments.
By covering the inter-exchange signalling needed for simple dialog services, the standard ensures that feature-rich, interactive business applications can be deployed with confidence in their interoperability and compatibility.
Related Standards
Implementers and users may also consider the following related standards referenced within SIST EN 301 921 V1.1.1:2005 for a comprehensive solution:
- EN 300 172 (ISO/IEC 11572 modified): Circuit-mode basic services for PISN.
- ETS 300 475-1 (ISO/IEC 11579-1 modified): Reference configuration for Private Telecommunication Networks.
- EN 300 239 (ISO/IEC 11582 modified): Generic functional protocol for supplementary services.
- EN 301 920 (ISO/IEC 21407 modified): Specification, functional model and information flows for Simple Dialog supplementary service.
These standards collectively address the architecture, protocols, and functional models required for robust and interoperable private integrated services networks, ensuring seamless delivery of advanced telecommunication services.
Keywords: Private Integrated Services Network, PISN, QSIG, supplementary service, inter-exchange signalling protocol, Simple Dialog, keypad information, display information, telecommunication standards, EN 301 921, ISO/IEC 21408, ETSI standards, enterprise communications.
